ia64/linux-2.6.18-xen.hg

view Makefile @ 562:66faefe721eb

pvSCSI backend driver

Signed-off-by: Tomonari Horikoshi <t.horikoshi@jp.fujitsu.com>
Signed-off-by: Jun Kamada <kama@jp.fujitsu.com>
author Keir Fraser <keir.fraser@citrix.com>
date Mon Jun 02 09:58:27 2008 +0100 (2008-06-02)
parents 3e8752eb6d9c
children
line source
1 VERSION = 2
2 PATCHLEVEL = 6
3 SUBLEVEL = 18
4 EXTRAVERSION = .8
5 NAME=Avast! A bilge rat!
7 # *DOCUMENTATION*
8 # To see a list of typical targets execute "make help"
9 # More info can be located in ./README
10 # Comments in this file are targeted only to the developer, do not
11 # expect to learn how to build the kernel reading this file.
13 # Do not print "Entering directory ..."
14 MAKEFLAGS += --no-print-directory
16 # We are using a recursive build, so we need to do a little thinking
17 # to get the ordering right.
18 #
19 # Most importantly: sub-Makefiles should only ever modify files in
20 # their own directory. If in some directory we have a dependency on
21 # a file in another dir (which doesn't happen often, but it's often
22 # unavoidable when linking the built-in.o targets which finally
23 # turn into vmlinux), we will call a sub make in that other dir, and
24 # after that we are sure that everything which is in that other dir
25 # is now up to date.
26 #
27 # The only cases where we need to modify files which have global
28 # effects are thus separated out and done before the recursive
29 # descending is started. They are now explicitly listed as the
30 # prepare rule.
32 # To put more focus on warnings, be less verbose as default
33 # Use 'make V=1' to see the full commands
35 ifdef V
36 ifeq ("$(origin V)", "command line")
37 KBUILD_VERBOSE = $(V)
38 endif
39 endif
40 ifndef KBUILD_VERBOSE
41 KBUILD_VERBOSE = 0
42 endif
44 # Call checker as part of compilation of C files
45 # Use 'make C=1' to enable checking (sparse, by default)
46 # Override with 'make C=1 CHECK=checker_executable CHECKFLAGS=....'
48 ifdef C
49 ifeq ("$(origin C)", "command line")
50 KBUILD_CHECKSRC = $(C)
51 endif
52 endif
53 ifndef KBUILD_CHECKSRC
54 KBUILD_CHECKSRC = 0
55 endif
57 # Use make M=dir to specify directory of external module to build
58 # Old syntax make ... SUBDIRS=$PWD is still supported
59 # Setting the environment variable KBUILD_EXTMOD take precedence
60 ifdef SUBDIRS
61 KBUILD_EXTMOD ?= $(SUBDIRS)
62 endif
63 ifdef M
64 ifeq ("$(origin M)", "command line")
65 KBUILD_EXTMOD := $(M)
66 endif
67 endif
70 # kbuild supports saving output files in a separate directory.
71 # To locate output files in a separate directory two syntaxes are supported.
72 # In both cases the working directory must be the root of the kernel src.
73 # 1) O=
74 # Use "make O=dir/to/store/output/files/"
75 #
76 # 2) Set KBUILD_OUTPUT
77 # Set the environment variable KBUILD_OUTPUT to point to the directory
78 # where the output files shall be placed.
79 # export KBUILD_OUTPUT=dir/to/store/output/files/
80 # make
81 #
82 # The O= assignment takes precedence over the KBUILD_OUTPUT environment
83 # variable.
86 # KBUILD_SRC is set on invocation of make in OBJ directory
87 # KBUILD_SRC is not intended to be used by the regular user (for now)
88 ifeq ($(KBUILD_SRC),)
90 # OK, Make called in directory where kernel src resides
91 # Do we want to locate output files in a separate directory?
92 ifdef O
93 ifeq ("$(origin O)", "command line")
94 KBUILD_OUTPUT := $(O)
95 endif
96 endif
98 # That's our default target when none is given on the command line
99 PHONY := _all
100 _all:
102 ifneq ($(KBUILD_OUTPUT),)
103 # Invoke a second make in the output directory, passing relevant variables
104 # check that the output directory actually exists
105 saved-output := $(KBUILD_OUTPUT)
106 KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd)
107 $(if $(KBUILD_OUTPUT),, \
108 $(error output directory "$(saved-output)" does not exist))
110 PHONY += $(MAKECMDGOALS)
112 $(filter-out _all,$(MAKECMDGOALS)) _all:
113 $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \
114 KBUILD_SRC=$(CURDIR) \
115 KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@
117 # Leave processing to above invocation of make
118 skip-makefile := 1
119 endif # ifneq ($(KBUILD_OUTPUT),)
120 endif # ifeq ($(KBUILD_SRC),)
122 # We process the rest of the Makefile if this is the final invocation of make
123 ifeq ($(skip-makefile),)
125 # If building an external module we do not care about the all: rule
126 # but instead _all depend on modules
127 PHONY += all
128 ifeq ($(KBUILD_EXTMOD),)
129 _all: all
130 else
131 _all: modules
132 endif
134 srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR))
135 TOPDIR := $(srctree)
136 # FIXME - TOPDIR is obsolete, use srctree/objtree
137 objtree := $(CURDIR)
138 src := $(srctree)
139 obj := $(objtree)
141 VPATH := $(srctree)$(if $(KBUILD_EXTMOD),:$(KBUILD_EXTMOD))
143 export srctree objtree VPATH TOPDIR
146 # SUBARCH tells the usermode build what the underlying arch is. That is set
147 # first, and if a usermode build is happening, the "ARCH=um" on the command
148 # line overrides the setting of ARCH below. If a native build is happening,
149 # then ARCH is assigned, getting whatever value it gets normally, and
150 # SUBARCH is subsequently ignored.
152 SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
153 -e s/arm.*/arm/ -e s/sa110/arm/ \
154 -e s/s390x/s390/ -e s/parisc64/parisc/ \
155 -e s/ppc.*/powerpc/ -e s/mips.*/mips/ )
157 # Cross compiling and selecting different set of gcc/bin-utils
158 # ---------------------------------------------------------------------------
159 #
160 # When performing cross compilation for other architectures ARCH shall be set
161 # to the target architecture. (See arch/* for the possibilities).
162 # ARCH can be set during invocation of make:
163 # make ARCH=ia64
164 # Another way is to have ARCH set in the environment.
165 # The default ARCH is the host where make is executed.
167 # CROSS_COMPILE specify the prefix used for all executables used
168 # during compilation. Only gcc and related bin-utils executables
169 # are prefixed with $(CROSS_COMPILE).
170 # CROSS_COMPILE can be set on the command line
171 # make CROSS_COMPILE=ia64-linux-
172 # Alternatively CROSS_COMPILE can be set in the environment.
173 # Default value for CROSS_COMPILE is not to prefix executables
174 # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile
176 ARCH ?= $(SUBARCH)
177 CROSS_COMPILE ?=
179 # Architecture as present in compile.h
180 UTS_MACHINE := $(ARCH)
182 KCONFIG_CONFIG ?= .config
184 # SHELL used by kbuild
185 CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
186 else if [ -x /bin/bash ]; then echo /bin/bash; \
187 else echo sh; fi ; fi)
189 HOSTCC = gcc
190 HOSTCXX = g++
191 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
192 HOSTCXXFLAGS = -O2
194 # Decide whether to build built-in, modular, or both.
195 # Normally, just do built-in.
197 KBUILD_MODULES :=
198 KBUILD_BUILTIN := 1
200 # If we have only "make modules", don't compile built-in objects.
201 # When we're building modules with modversions, we need to consider
202 # the built-in objects during the descend as well, in order to
203 # make sure the checksums are up to date before we record them.
205 ifeq ($(MAKECMDGOALS),modules)
206 KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1)
207 endif
209 # If we have "make <whatever> modules", compile modules
210 # in addition to whatever we do anyway.
211 # Just "make" or "make all" shall build modules as well
213 ifneq ($(filter all _all modules,$(MAKECMDGOALS)),)
214 KBUILD_MODULES := 1
215 endif
217 ifeq ($(MAKECMDGOALS),)
218 KBUILD_MODULES := 1
219 endif
221 export KBUILD_MODULES KBUILD_BUILTIN
222 export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD
224 # Beautify output
225 # ---------------------------------------------------------------------------
226 #
227 # Normally, we echo the whole command before executing it. By making
228 # that echo $($(quiet)$(cmd)), we now have the possibility to set
229 # $(quiet) to choose other forms of output instead, e.g.
230 #
231 # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@
232 # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<
233 #
234 # If $(quiet) is empty, the whole command will be printed.
235 # If it is set to "quiet_", only the short version will be printed.
236 # If it is set to "silent_", nothing will be printed at all, since
237 # the variable $(silent_cmd_cc_o_c) doesn't exist.
238 #
239 # A simple variant is to prefix commands with $(Q) - that's useful
240 # for commands that shall be hidden in non-verbose mode.
241 #
242 # $(Q)ln $@ :<
243 #
244 # If KBUILD_VERBOSE equals 0 then the above command will be hidden.
245 # If KBUILD_VERBOSE equals 1 then the above command is displayed.
247 ifeq ($(KBUILD_VERBOSE),1)
248 quiet =
249 Q =
250 else
251 quiet=quiet_
252 Q = @
253 endif
255 # If the user is running make -s (silent mode), suppress echoing of
256 # commands
258 ifneq ($(findstring s,$(MAKEFLAGS)),)
259 quiet=silent_
260 endif
262 export quiet Q KBUILD_VERBOSE
265 # Look for make include files relative to root of kernel src
266 MAKEFLAGS += --include-dir=$(srctree)
268 # We need some generic definitions
269 include $(srctree)/scripts/Kbuild.include
271 # Do not use make's built-in rules and variables
272 # This increases performance and avoid hard-to-debug behavour
273 MAKEFLAGS += -rR
275 # Make variables (CC, etc...)
277 AS = $(CROSS_COMPILE)as
278 LD = $(CROSS_COMPILE)ld
279 CC = $(CROSS_COMPILE)gcc
280 CPP = $(CC) -E
281 AR = $(CROSS_COMPILE)ar
282 NM = $(CROSS_COMPILE)nm
283 STRIP = $(CROSS_COMPILE)strip
284 OBJCOPY = $(CROSS_COMPILE)objcopy
285 OBJDUMP = $(CROSS_COMPILE)objdump
286 AWK = awk
287 GENKSYMS = scripts/genksyms/genksyms
288 DEPMOD = /sbin/depmod
289 KALLSYMS = scripts/kallsyms
290 PERL = perl
291 CHECK = sparse
293 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF)
294 MODFLAGS = -DMODULE
295 CFLAGS_MODULE = $(MODFLAGS)
296 AFLAGS_MODULE = $(MODFLAGS)
297 LDFLAGS_MODULE = -r
298 CFLAGS_KERNEL =
299 AFLAGS_KERNEL =
302 # Use LINUXINCLUDE when you must reference the include/ directory.
303 # Needed to be compatible with the O= option
304 LINUXINCLUDE := -Iinclude \
305 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
306 -include include/linux/autoconf.h
308 CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE)
310 CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
311 -fno-strict-aliasing -fno-common
312 AFLAGS := -D__ASSEMBLY__
314 # Read KERNELRELEASE from include/config/kernel.release (if it exists)
315 KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
316 KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
318 export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION
319 export ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
320 export CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE
321 export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
323 export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
324 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE
325 export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
327 # When compiling out-of-tree modules, put MODVERDIR in the module
328 # tree rather than in the kernel tree. The kernel tree might
329 # even be read-only.
330 export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions
332 # Files to ignore in find ... statements
334 RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o
335 export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git
337 # ===========================================================================
338 # Rules shared between *config targets and build targets
340 # Basic helpers built in scripts/
341 PHONY += scripts_basic
342 scripts_basic:
343 $(Q)$(MAKE) $(build)=scripts/basic
345 # To avoid any implicit rule to kick in, define an empty command.
346 scripts/basic/%: scripts_basic ;
348 PHONY += outputmakefile
349 # outputmakefile generates a Makefile in the output directory, if using a
350 # separate output directory. This allows convenient use of make in the
351 # output directory.
352 outputmakefile:
353 ifneq ($(KBUILD_SRC),)
354 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \
355 $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL)
356 endif
358 # To make sure we do not include .config for any of the *config targets
359 # catch them early, and hand them over to scripts/kconfig/Makefile
360 # It is allowed to specify more targets when calling make, including
361 # mixing *config targets and build targets.
362 # For example 'make oldconfig all'.
363 # Detect when mixed targets is specified, and make a second invocation
364 # of make so .config is not included in this case either (for *config).
366 no-dot-config-targets := clean mrproper distclean \
367 cscope TAGS tags help %docs check% \
368 include/linux/version.h headers_% \
369 kernelrelease kernelversion
371 config-targets := 0
372 mixed-targets := 0
373 dot-config := 1
375 ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
376 ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
377 dot-config := 0
378 endif
379 endif
381 ifeq ($(KBUILD_EXTMOD),)
382 ifneq ($(filter config %config,$(MAKECMDGOALS)),)
383 config-targets := 1
384 ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
385 mixed-targets := 1
386 endif
387 endif
388 endif
390 ifeq ($(mixed-targets),1)
391 # ===========================================================================
392 # We're called with mixed targets (*config and build targets).
393 # Handle them one by one.
395 %:: FORCE
396 $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
398 else
399 ifeq ($(config-targets),1)
400 # ===========================================================================
401 # *config targets only - make sure prerequisites are updated, and descend
402 # in scripts/kconfig to make the *config target
404 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
405 # KBUILD_DEFCONFIG may point out an alternative default configuration
406 # used for 'make defconfig'
407 include $(srctree)/arch/$(ARCH)/Makefile
408 export KBUILD_DEFCONFIG
410 config %config: scripts_basic outputmakefile FORCE
411 $(Q)mkdir -p include/linux include/config
412 $(Q)$(MAKE) $(build)=scripts/kconfig $@
414 else
415 # ===========================================================================
416 # Build targets only - this includes vmlinux, arch specific targets, clean
417 # targets and others. In general all targets except *config targets.
419 ifeq ($(KBUILD_EXTMOD),)
420 # Additional helpers built in scripts/
421 # Carefully list dependencies so we do not try to build scripts twice
422 # in parallel
423 PHONY += scripts
424 scripts: scripts_basic include/config/auto.conf
425 $(Q)$(MAKE) $(build)=$(@)
427 # Objects we will link into vmlinux / subdirs we need to visit
428 init-y := init/
429 drivers-y := drivers/ sound/
430 net-y := net/
431 libs-y := lib/
432 core-y := usr/
433 endif # KBUILD_EXTMOD
435 ifeq ($(dot-config),1)
436 # Read in config
437 -include include/config/auto.conf
439 ifeq ($(KBUILD_EXTMOD),)
440 # Read in dependencies to all Kconfig* files, make sure to run
441 # oldconfig if changes are detected.
442 -include include/config/auto.conf.cmd
444 # To avoid any implicit rule to kick in, define an empty command
445 $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
447 # If .config is newer than include/config/auto.conf, someone tinkered
448 # with it and forgot to run make oldconfig.
449 # if auto.conf.cmd is missing then we are probably in a cleaned tree so
450 # we execute the config step to be sure to catch updated Kconfig files
451 include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
452 $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
453 else
454 # external modules needs include/linux/autoconf.h and include/config/auto.conf
455 # but do not care if they are up-to-date. Use auto.conf to trigger the test
456 PHONY += include/config/auto.conf
458 include/config/auto.conf:
459 $(Q)test -e include/linux/autoconf.h -a -e $@ || ( \
460 echo; \
461 echo " ERROR: Kernel configuration is invalid."; \
462 echo " include/linux/autoconf.h or $@ are missing."; \
463 echo " Run 'make oldconfig && make prepare' on kernel src to fix it."; \
464 echo; \
465 /bin/false)
467 endif # KBUILD_EXTMOD
469 else
470 # Dummy target needed, because used as prerequisite
471 include/config/auto.conf: ;
472 endif # $(dot-config)
474 # The all: target is the default when no target is given on the
475 # command line.
476 # This allow a user to issue only 'make' to build a kernel including modules
477 # Defaults vmlinux but it is usually overridden in the arch makefile
478 all: vmlinux
480 ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
481 CFLAGS += -Os
482 else
483 CFLAGS += -O2
484 endif
486 include $(srctree)/arch/$(ARCH)/Makefile
488 ifdef CONFIG_FRAME_POINTER
489 CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,)
490 else
491 CFLAGS += -fomit-frame-pointer
492 endif
494 ifdef CONFIG_UNWIND_INFO
495 CFLAGS += -fasynchronous-unwind-tables
496 endif
498 ifdef CONFIG_DEBUG_INFO
499 CFLAGS += -g
500 endif
502 # Force gcc to behave correct even for buggy distributions
503 CFLAGS += $(call cc-option, -fno-stack-protector)
505 # arch Makefile may override CC so keep this after arch Makefile is included
506 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
507 CHECKFLAGS += $(NOSTDINC_FLAGS)
509 # warn about C99 declaration after statement
510 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
512 # disable pointer signed / unsigned warnings in gcc 4.0
513 CFLAGS += $(call cc-option,-Wno-pointer-sign,)
515 # Default kernel image to build when no specific target is given.
516 # KBUILD_IMAGE may be overruled on the command line or
517 # set in the environment
518 # Also any assignments in arch/$(ARCH)/Makefile take precedence over
519 # this default value
520 export KBUILD_IMAGE ?= vmlinux
522 #
523 # INSTALL_PATH specifies where to place the updated kernel and system map
524 # images. Default is /boot, but you can set it to other values
525 export INSTALL_PATH ?= /boot
527 #
528 # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory
529 # relocations required by build roots. This is not defined in the
530 # makefile but the argument can be passed to make if needed.
531 #
533 MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
534 export MODLIB
536 #
537 # INSTALL_MOD_STRIP, if defined, will cause modules to be
538 # stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
539 # the default option --strip-debug will be used. Otherwise,
540 # INSTALL_MOD_STRIP will used as the options to the strip command.
542 ifdef INSTALL_MOD_STRIP
543 ifeq ($(INSTALL_MOD_STRIP),1)
544 mod_strip_cmd = $(STRIP) --strip-debug
545 else
546 mod_strip_cmd = $(STRIP) $(INSTALL_MOD_STRIP)
547 endif # INSTALL_MOD_STRIP=1
548 else
549 mod_strip_cmd = true
550 endif # INSTALL_MOD_STRIP
551 export mod_strip_cmd
554 ifeq ($(KBUILD_EXTMOD),)
555 core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
557 vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \
558 $(core-y) $(core-m) $(drivers-y) $(drivers-m) \
559 $(net-y) $(net-m) $(libs-y) $(libs-m)))
561 vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \
562 $(init-n) $(init-) \
563 $(core-n) $(core-) $(drivers-n) $(drivers-) \
564 $(net-n) $(net-) $(libs-n) $(libs-))))
566 init-y := $(patsubst %/, %/built-in.o, $(init-y))
567 core-y := $(patsubst %/, %/built-in.o, $(core-y))
568 drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y))
569 net-y := $(patsubst %/, %/built-in.o, $(net-y))
570 libs-y1 := $(patsubst %/, %/lib.a, $(libs-y))
571 libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y))
572 libs-y := $(libs-y1) $(libs-y2)
574 # Build vmlinux
575 # ---------------------------------------------------------------------------
576 # vmlinux is built from the objects selected by $(vmlinux-init) and
577 # $(vmlinux-main). Most are built-in.o files from top-level directories
578 # in the kernel tree, others are specified in arch/$(ARCH)Makefile.
579 # Ordering when linking is important, and $(vmlinux-init) must be first.
580 #
581 # vmlinux
582 # ^
583 # |
584 # +-< $(vmlinux-init)
585 # | +--< init/version.o + more
586 # |
587 # +--< $(vmlinux-main)
588 # | +--< driver/built-in.o mm/built-in.o + more
589 # |
590 # +-< kallsyms.o (see description in CONFIG_KALLSYMS section)
591 #
592 # vmlinux version (uname -v) cannot be updated during normal
593 # descending-into-subdirs phase since we do not yet know if we need to
594 # update vmlinux.
595 # Therefore this step is delayed until just before final link of vmlinux -
596 # except in the kallsyms case where it is done just before adding the
597 # symbols to the kernel.
598 #
599 # System.map is generated to document addresses of all kernel symbols
601 vmlinux-init := $(head-y) $(init-y)
602 vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y)
603 vmlinux-all := $(vmlinux-init) $(vmlinux-main)
604 vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds
606 # Rule to link vmlinux - also used during CONFIG_KALLSYMS
607 # May be overridden by arch/$(ARCH)/Makefile
608 quiet_cmd_vmlinux__ ?= LD $@
609 cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \
610 -T $(vmlinux-lds) $(vmlinux-init) \
611 --start-group $(vmlinux-main) --end-group \
612 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^)
614 # Generate new vmlinux version
615 quiet_cmd_vmlinux_version = GEN .version
616 cmd_vmlinux_version = set -e; \
617 if [ ! -r .version ]; then \
618 rm -f .version; \
619 echo 1 >.version; \
620 else \
621 mv .version .old_version; \
622 expr 0$$(cat .old_version) + 1 >.version; \
623 fi; \
624 $(MAKE) $(build)=init
626 # Generate System.map
627 quiet_cmd_sysmap = SYSMAP
628 cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
630 # Link of vmlinux
631 # If CONFIG_KALLSYMS is set .version is already updated
632 # Generate System.map and verify that the content is consistent
633 # Use + in front of the vmlinux_version rule to silent warning with make -j2
634 # First command is ':' to allow us to use + in front of the rule
635 define rule_vmlinux__
636 :
637 $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version))
639 $(call cmd,vmlinux__)
640 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
642 $(Q)$(if $($(quiet)cmd_sysmap), \
643 echo ' $($(quiet)cmd_sysmap) System.map' &&) \
644 $(cmd_sysmap) $@ System.map; \
645 if [ $$? -ne 0 ]; then \
646 rm -f $@; \
647 /bin/false; \
648 fi;
649 $(verify_kallsyms)
650 endef
653 ifdef CONFIG_KALLSYMS
654 # Generate section listing all symbols and add it into vmlinux $(kallsyms.o)
655 # It's a three stage process:
656 # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is
657 # empty
658 # Running kallsyms on that gives us .tmp_kallsyms1.o with
659 # the right size - vmlinux version (uname -v) is updated during this step
660 # o .tmp_vmlinux2 now has a __kallsyms section of the right size,
661 # but due to the added section, some addresses have shifted.
662 # From here, we generate a correct .tmp_kallsyms2.o
663 # o The correct .tmp_kallsyms2.o is linked into the final vmlinux.
664 # o Verify that the System.map from vmlinux matches the map from
665 # .tmp_vmlinux2, just in case we did not generate kallsyms correctly.
666 # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using
667 # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a
668 # temporary bypass to allow the kernel to be built while the
669 # maintainers work out what went wrong with kallsyms.
671 ifdef CONFIG_KALLSYMS_EXTRA_PASS
672 last_kallsyms := 3
673 else
674 last_kallsyms := 2
675 endif
677 kallsyms.o := .tmp_kallsyms$(last_kallsyms).o
679 define verify_kallsyms
680 $(Q)$(if $($(quiet)cmd_sysmap), \
681 echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \
682 $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map
683 $(Q)cmp -s System.map .tmp_System.map || \
684 (echo Inconsistent kallsyms data; \
685 echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \
686 rm .tmp_kallsyms* ; /bin/false )
687 endef
689 # Update vmlinux version before link
690 # Use + in front of this rule to silent warning about make -j1
691 # First command is ':' to allow us to use + in front of this rule
692 cmd_ksym_ld = $(cmd_vmlinux__)
693 define rule_ksym_ld
694 :
695 +$(call cmd,vmlinux_version)
696 $(call cmd,vmlinux__)
697 $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd
698 endef
700 # Generate .S file with all kernel symbols
701 quiet_cmd_kallsyms = KSYM $@
702 cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \
703 $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@
705 .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE
706 $(call if_changed_dep,as_o_S)
708 .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS)
709 $(call cmd,kallsyms)
711 # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version
712 .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE
713 $(call if_changed_rule,ksym_ld)
715 .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE
716 $(call if_changed,vmlinux__)
718 .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE
719 $(call if_changed,vmlinux__)
721 # Needs to visit scripts/ before $(KALLSYMS) can be used.
722 $(KALLSYMS): scripts ;
724 # Generate some data for debugging strange kallsyms problems
725 debug_kallsyms: .tmp_map$(last_kallsyms)
727 .tmp_map%: .tmp_vmlinux% FORCE
728 ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@
730 .tmp_map3: .tmp_map2
732 .tmp_map2: .tmp_map1
734 endif # ifdef CONFIG_KALLSYMS
736 # vmlinux image - including updated kernel symbols
737 vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE
738 $(call if_changed_rule,vmlinux__)
739 $(Q)rm -f .old_version
741 # The actual objects are generated when descending,
742 # make sure no implicit rule kicks in
743 $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ;
745 # Handle descending into subdirectories listed in $(vmlinux-dirs)
746 # Preset locale variables to speed up the build process. Limit locale
747 # tweaks to this spot to avoid wrong language settings when running
748 # make menuconfig etc.
749 # Error messages still appears in the original language
751 PHONY += $(vmlinux-dirs)
752 $(vmlinux-dirs): prepare scripts
753 $(Q)$(MAKE) $(build)=$@
755 # Build the kernel release string
756 # The KERNELRELEASE is stored in a file named include/config/kernel.release
757 # to be used when executing for example make install or make modules_install
758 #
759 # Take the contents of any files called localversion* and the config
760 # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE.
761 # LOCALVERSION from the command line override all of this
763 nullstring :=
764 space := $(nullstring) # end of line
766 ___localver = $(objtree)/localversion* $(srctree)/localversion*
767 __localver = $(sort $(wildcard $(___localver)))
768 # skip backup files (containing '~')
769 _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f)))
771 localver = $(subst $(space),, \
772 $(shell cat /dev/null $(_localver)) \
773 $(patsubst "%",%,$(CONFIG_LOCALVERSION)))
775 # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called
776 # and if the SCM is know a tag from the SCM is appended.
777 # The appended tag is determined by the SCM used.
778 #
779 # Currently, only git is supported.
780 # Other SCMs can edit scripts/setlocalversion and add the appropriate
781 # checks as needed.
782 ifdef CONFIG_LOCALVERSION_AUTO
783 _localver-auto = $(shell $(CONFIG_SHELL) \
784 $(srctree)/scripts/setlocalversion $(srctree))
785 localver-auto = $(LOCALVERSION)$(_localver-auto)
786 endif
788 localver-full = $(localver)$(localver-auto)
790 # Store (new) KERNELRELASE string in include/config/kernel.release
791 kernelrelease = $(KERNELVERSION)$(localver-full)
792 include/config/kernel.release: include/config/auto.conf FORCE
793 $(Q)rm -f $@
794 $(Q)echo $(kernelrelease) > $@
797 # Things we need to do before we recursively start building the kernel
798 # or the modules are listed in "prepare".
799 # A multi level approach is used. prepareN is processed before prepareN-1.
800 # archprepare is used in arch Makefiles and when processed asm symlink,
801 # version.h and scripts_basic is processed / created.
803 # Listed in dependency order
804 PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
806 # prepare-all is deprecated, use prepare as valid replacement
807 PHONY += prepare-all
809 # prepare3 is used to check if we are building in a separate output directory,
810 # and if so do:
811 # 1) Check that make has not been executed in the kernel src $(srctree)
812 # 2) Create the include2 directory, used for the second asm symlink
813 prepare3: include/config/kernel.release
814 ifneq ($(KBUILD_SRC),)
815 @echo ' Using $(srctree) as source for kernel'
816 $(Q)if [ -f $(srctree)/.config -o -d $(srctree)/include/config ]; then \
817 echo " $(srctree) is not clean, please run 'make mrproper'";\
818 echo " in the '$(srctree)' directory.";\
819 /bin/false; \
820 fi;
821 $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi;
822 $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm
823 endif
825 # prepare2 creates a makefile if using a separate output directory
826 prepare2: prepare3 outputmakefile
828 prepare1: prepare2 include/linux/version.h include/linux/utsrelease.h \
829 include/asm include/config/auto.conf
830 ifneq ($(KBUILD_MODULES),)
831 $(Q)mkdir -p $(MODVERDIR)
832 $(Q)rm -f $(MODVERDIR)/*
833 endif
835 archprepare: prepare1 scripts_basic
837 prepare0: archprepare FORCE
838 $(Q)$(MAKE) $(build)=.
840 # All the preparing..
841 prepare prepare-all: prepare0
843 # Leave this as default for preprocessing vmlinux.lds.S, which is now
844 # done in arch/$(ARCH)/kernel/Makefile
846 export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH)
848 # FIXME: The asm symlink changes when $(ARCH) changes. That's
849 # hard to detect, but I suppose "make mrproper" is a good idea
850 # before switching between archs anyway.
852 include/asm:
853 @echo ' SYMLINK $@ -> include/asm-$(ARCH)'
854 $(Q)if [ ! -d include ]; then mkdir -p include; fi;
855 @ln -fsn asm-$(ARCH) $@
857 # Generate some files
858 # ---------------------------------------------------------------------------
860 # KERNELRELEASE can change from a few different places, meaning version.h
861 # needs to be updated, so this check is forced on all builds
863 uts_len := 64
864 define filechk_utsrelease.h
865 if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \
866 echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \
867 exit 1; \
868 fi; \
869 (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\";)
870 endef
872 define filechk_version.h
873 (echo \#define LINUX_VERSION_CODE $(shell \
874 expr $(VERSION) \* 65536 + $(PATCHLEVEL) \* 256 + $(SUBLEVEL)); \
875 echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))';)
876 endef
878 include/linux/version.h: $(srctree)/Makefile FORCE
879 $(call filechk,version.h)
881 include/linux/utsrelease.h: include/config/kernel.release FORCE
882 $(call filechk,utsrelease.h)
884 # ---------------------------------------------------------------------------
886 PHONY += depend dep
887 depend dep:
888 @echo '*** Warning: make $@ is unnecessary now.'
890 # ---------------------------------------------------------------------------
891 # Kernel headers
892 INSTALL_HDR_PATH=$(objtree)/usr
893 export INSTALL_HDR_PATH
895 PHONY += headers_install
896 headers_install: include/linux/version.h
897 @if [ ! -r include/asm-$(ARCH)/Kbuild ]; then \
898 echo '*** Error: Headers not exportable for this architecture ($(ARCH))'; \
899 exit 1 ; fi
900 $(Q)unifdef -Ux /dev/null
901 $(Q)rm -rf $(INSTALL_HDR_PATH)/include
902 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include
904 PHONY += headers_check
905 headers_check: headers_install
906 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.headersinst obj=include HDRCHECK=1
908 # ---------------------------------------------------------------------------
909 # Modules
911 ifdef CONFIG_MODULES
913 # By default, build modules as well
915 all: modules
917 # Build modules
919 PHONY += modules
920 modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
921 @echo ' Building modules, stage 2.';
922 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
925 # Target to prepare building external modules
926 PHONY += modules_prepare
927 modules_prepare: prepare scripts
929 # Target to install modules
930 PHONY += modules_install
931 modules_install: _modinst_ _modinst_post
933 PHONY += _modinst_
934 _modinst_:
935 @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \
936 echo "Warning: you may need to install module-init-tools"; \
937 echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\
938 sleep 1; \
939 fi
940 @rm -rf $(MODLIB)/kernel
941 @rm -f $(MODLIB)/source
942 @mkdir -p $(MODLIB)/kernel
943 @ln -s $(srctree) $(MODLIB)/source
944 @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \
945 rm -f $(MODLIB)/build ; \
946 ln -s $(objtree) $(MODLIB)/build ; \
947 fi
948 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
950 # If System.map exists, run depmod. This deliberately does not have a
951 # dependency on System.map since that would run the dependency tree on
952 # vmlinux. This depmod is only for convenience to give the initial
953 # boot a modules.dep even before / is mounted read-write. However the
954 # boot script depmod is the master version.
955 ifeq "$(strip $(INSTALL_MOD_PATH))" ""
956 depmod_opts :=
957 else
958 depmod_opts := -b $(INSTALL_MOD_PATH) -r
959 endif
960 PHONY += _modinst_post
961 _modinst_post: _modinst_
962 if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi
964 else # CONFIG_MODULES
966 # Modules not configured
967 # ---------------------------------------------------------------------------
969 modules modules_install: FORCE
970 @echo
971 @echo "The present kernel configuration has modules disabled."
972 @echo "Type 'make config' and enable loadable module support."
973 @echo "Then build a kernel with module support enabled."
974 @echo
975 @exit 1
977 endif # CONFIG_MODULES
979 ###
980 # Cleaning is done on three levels.
981 # make clean Delete most generated files
982 # Leave enough to build external modules
983 # make mrproper Delete the current configuration, and all generated files
984 # make distclean Remove editor backup files, patch leftover files and the like
986 # Directories & files removed with 'make clean'
987 CLEAN_DIRS += $(MODVERDIR)
988 CLEAN_FILES += vmlinux System.map \
989 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
991 # Directories & files removed with 'make mrproper'
992 MRPROPER_DIRS += include/config include2 usr/include
993 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
994 include/linux/autoconf.h include/linux/version.h \
995 include/linux/utsrelease.h \
996 Module.symvers tags TAGS cscope*
998 # clean - Delete most, but leave enough to build external modules
999 #
1000 clean: rm-dirs := $(CLEAN_DIRS)
1001 clean: rm-files := $(CLEAN_FILES)
1002 clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs))
1004 PHONY += $(clean-dirs) clean archclean
1005 $(clean-dirs):
1006 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1008 clean: archclean $(clean-dirs)
1009 $(call cmd,rmdirs)
1010 $(call cmd,rmfiles)
1011 @find . $(RCS_FIND_IGNORE) \
1012 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1013 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
1014 -o -name '*.symtypes' \) \
1015 -type f -print | xargs rm -f
1017 # mrproper - Delete all generated files, including .config
1019 mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS))
1020 mrproper: rm-files := $(wildcard $(MRPROPER_FILES))
1021 mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts)
1023 PHONY += $(mrproper-dirs) mrproper archmrproper
1024 $(mrproper-dirs):
1025 $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@)
1027 mrproper: clean archmrproper $(mrproper-dirs)
1028 $(call cmd,rmdirs)
1029 $(call cmd,rmfiles)
1031 # distclean
1033 PHONY += distclean
1035 distclean: mrproper
1036 @find $(srctree) $(RCS_FIND_IGNORE) \
1037 \( -name '*.orig' -o -name '*.rej' -o -name '*~' \
1038 -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
1039 -o -name '.*.rej' -o -size 0 \
1040 -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \
1041 -type f -print | xargs rm -f
1044 # Packaging of the kernel to various formats
1045 # ---------------------------------------------------------------------------
1046 # rpm target kept for backward compatibility
1047 package-dir := $(srctree)/scripts/package
1049 %pkg: include/config/kernel.release FORCE
1050 $(Q)$(MAKE) $(build)=$(package-dir) $@
1051 rpm: include/config/kernel.release FORCE
1052 $(Q)$(MAKE) $(build)=$(package-dir) $@
1055 # Brief documentation of the typical targets used
1056 # ---------------------------------------------------------------------------
1058 boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig)
1059 boards := $(notdir $(boards))
1061 help:
1062 @echo 'Cleaning targets:'
1063 @echo ' clean - remove most generated files but keep the config'
1064 @echo ' mrproper - remove all generated files + config + various backup files'
1065 @echo ''
1066 @echo 'Configuration targets:'
1067 @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help
1068 @echo ''
1069 @echo 'Other generic targets:'
1070 @echo ' all - Build all targets marked with [*]'
1071 @echo '* vmlinux - Build the bare kernel'
1072 @echo '* modules - Build all modules'
1073 @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)'
1074 @echo ' dir/ - Build all files in dir and below'
1075 @echo ' dir/file.[ois] - Build specified target only'
1076 @echo ' dir/file.ko - Build module including final link'
1077 @echo ' rpm - Build a kernel as an RPM package'
1078 @echo ' tags/TAGS - Generate tags file for editors'
1079 @echo ' cscope - Generate cscope index'
1080 @echo ' kernelrelease - Output the release version string'
1081 @echo ' kernelversion - Output the version stored in Makefile'
1082 @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1083 echo ' headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \
1084 fi
1085 @echo ' (default: $(INSTALL_HDR_PATH))'
1086 @echo ''
1087 @echo 'Static analysers'
1088 @echo ' checkstack - Generate a list of stack hogs'
1089 @echo ' namespacecheck - Name space analysis on compiled kernel'
1090 @if [ -r include/asm-$(ARCH)/Kbuild ]; then \
1091 echo ' headers_check - Sanity check on exported headers'; \
1092 fi
1093 @echo ''
1094 @echo 'Kernel packaging:'
1095 @$(MAKE) $(build)=$(package-dir) help
1096 @echo ''
1097 @echo 'Documentation targets:'
1098 @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp
1099 @echo ''
1100 @echo 'Architecture specific targets ($(ARCH)):'
1101 @$(if $(archhelp),$(archhelp),\
1102 echo ' No architecture specific help defined for $(ARCH)')
1103 @echo ''
1104 @$(if $(boards), \
1105 $(foreach b, $(boards), \
1106 printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \
1107 echo '')
1109 @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build'
1110 @echo ' make O=dir [targets] Locate all output files in "dir", including .config'
1111 @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)'
1112 @echo ' make C=2 [targets] Force check of all c source with $$CHECK'
1113 @echo ''
1114 @echo 'Execute "make" or "make all" to build all targets marked with [*] '
1115 @echo 'For further info see the ./README file'
1118 # Documentation targets
1119 # ---------------------------------------------------------------------------
1120 %docs: scripts_basic FORCE
1121 $(Q)$(MAKE) $(build)=Documentation/DocBook $@
1123 else # KBUILD_EXTMOD
1125 ###
1126 # External module support.
1127 # When building external modules the kernel used as basis is considered
1128 # read-only, and no consistency checks are made and the make
1129 # system is not used on the basis kernel. If updates are required
1130 # in the basis kernel ordinary make commands (without M=...) must
1131 # be used.
1133 # The following are the only valid targets when building external
1134 # modules.
1135 # make M=dir clean Delete all automatically generated files
1136 # make M=dir modules Make all modules in specified dir
1137 # make M=dir Same as 'make M=dir modules'
1138 # make M=dir modules_install
1139 # Install the modules built in the module directory
1140 # Assumes install directory is already created
1142 # We are always building modules
1143 KBUILD_MODULES := 1
1144 PHONY += crmodverdir
1145 crmodverdir:
1146 $(Q)mkdir -p $(MODVERDIR)
1147 $(Q)rm -f $(MODVERDIR)/*
1149 PHONY += $(objtree)/Module.symvers
1150 $(objtree)/Module.symvers:
1151 @test -e $(objtree)/Module.symvers || ( \
1152 echo; \
1153 echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \
1154 echo " is missing; modules will have no dependencies and modversions."; \
1155 echo )
1157 module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD))
1158 PHONY += $(module-dirs) modules
1159 $(module-dirs): crmodverdir $(objtree)/Module.symvers
1160 $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@)
1162 modules: $(module-dirs)
1163 @echo ' Building modules, stage 2.';
1164 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1166 PHONY += modules_install
1167 modules_install: _emodinst_ _emodinst_post
1169 install-dir := $(if $(INSTALL_MOD_DIR),$(INSTALL_MOD_DIR),extra)
1170 PHONY += _emodinst_
1171 _emodinst_:
1172 $(Q)mkdir -p $(MODLIB)/$(install-dir)
1173 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst
1175 # Run depmod only is we have System.map and depmod is executable
1176 quiet_cmd_depmod = DEPMOD $(KERNELRELEASE)
1177 cmd_depmod = if [ -r System.map -a -x $(DEPMOD) ]; then \
1178 $(DEPMOD) -ae -F System.map \
1179 $(if $(strip $(INSTALL_MOD_PATH)), \
1180 -b $(INSTALL_MOD_PATH) -r) \
1181 $(KERNELRELEASE); \
1182 fi
1184 PHONY += _emodinst_post
1185 _emodinst_post: _emodinst_
1186 $(call cmd,depmod)
1188 clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD))
1190 PHONY += $(clean-dirs) clean
1191 $(clean-dirs):
1192 $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@)
1194 clean: rm-dirs := $(MODVERDIR)
1195 clean: $(clean-dirs)
1196 $(call cmd,rmdirs)
1197 @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \
1198 \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
1199 -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \
1200 -type f -print | xargs rm -f
1202 help:
1203 @echo ' Building external modules.'
1204 @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target'
1205 @echo ''
1206 @echo ' modules - default target, build the module(s)'
1207 @echo ' modules_install - install the module'
1208 @echo ' clean - remove generated files in module directory only'
1209 @echo ''
1211 # Dummies...
1212 PHONY += prepare scripts
1213 prepare: ;
1214 scripts: ;
1215 endif # KBUILD_EXTMOD
1217 # Generate tags for editors
1218 # ---------------------------------------------------------------------------
1220 #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set
1221 #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file.
1222 #Adding $(srctree) adds about 20M on i386 to the size of the output file!
1224 ifeq ($(src),$(obj))
1225 __srctree =
1226 else
1227 __srctree = $(srctree)/
1228 endif
1230 ifeq ($(ALLSOURCE_ARCHS),)
1231 ifeq ($(ARCH),um)
1232 ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH)
1233 else
1234 ALLINCLUDE_ARCHS := $(ARCH)
1235 endif
1236 else
1237 #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behavour.
1238 ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS)
1239 endif
1241 ALLSOURCE_ARCHS := $(ARCH)
1243 define find-sources
1244 ( find $(__srctree) $(RCS_FIND_IGNORE) \
1245 \( -name include -o -name arch \) -prune -o \
1246 -name $1 -print; \
1247 for ARCH in $(ALLSOURCE_ARCHS) ; do \
1248 find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \
1249 -name $1 -print; \
1250 done ; \
1251 find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \
1252 -name $1 -print; \
1253 find $(__srctree)include $(RCS_FIND_IGNORE) \
1254 \( -name config -o -name 'asm-*' \) -prune \
1255 -o -name $1 -print; \
1256 for ARCH in $(ALLINCLUDE_ARCHS) ; do \
1257 find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \
1258 -name $1 -print; \
1259 done ; \
1260 find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \
1261 -name $1 -print )
1262 endef
1264 define all-sources
1265 $(call find-sources,'*.[chS]')
1266 endef
1267 define all-kconfigs
1268 $(call find-sources,'Kconfig*')
1269 endef
1270 define all-defconfigs
1271 $(call find-sources,'defconfig')
1272 endef
1274 quiet_cmd_cscope-file = FILELST cscope.files
1275 cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files
1277 quiet_cmd_cscope = MAKE cscope.out
1278 cmd_cscope = cscope -b
1280 cscope: FORCE
1281 $(call cmd,cscope-file)
1282 $(call cmd,cscope)
1284 quiet_cmd_TAGS = MAKE $@
1285 define cmd_TAGS
1286 rm -f $@; \
1287 ETAGSF=`etags --version | grep -i exuberant >/dev/null && \
1288 echo "-I __initdata,__exitdata,__acquires,__releases \
1289 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1290 --extra=+f --c-kinds=+px"`; \
1291 $(all-sources) | xargs etags $$ETAGSF -a; \
1292 if test "x$$ETAGSF" = x; then \
1293 $(all-kconfigs) | xargs etags -a \
1294 --regex='/^config[ \t]+\([a-zA-Z0-9_]+\)/\1/'; \
1295 $(all-defconfigs) | xargs etags -a \
1296 --regex='/^#?[ \t]?\(CONFIG_[a-zA-Z0-9_]+\)/\1/'; \
1297 fi
1298 endef
1300 TAGS: FORCE
1301 $(call cmd,TAGS)
1304 quiet_cmd_tags = MAKE $@
1305 define cmd_tags
1306 rm -f $@; \
1307 CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \
1308 echo "-I __initdata,__exitdata,__acquires,__releases \
1309 -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \
1310 --extra=+f --c-kinds=+px"`; \
1311 $(all-sources) | xargs ctags $$CTAGSF -a
1312 endef
1314 tags: FORCE
1315 $(call cmd,tags)
1318 # Scripts to check various things for consistency
1319 # ---------------------------------------------------------------------------
1321 includecheck:
1322 find * $(RCS_FIND_IGNORE) \
1323 -name '*.[hcS]' -type f -print | sort \
1324 | xargs $(PERL) -w scripts/checkincludes.pl
1326 versioncheck:
1327 find * $(RCS_FIND_IGNORE) \
1328 -name '*.[hcS]' -type f -print | sort \
1329 | xargs $(PERL) -w scripts/checkversion.pl
1331 namespacecheck:
1332 $(PERL) $(srctree)/scripts/namespace.pl
1334 endif #ifeq ($(config-targets),1)
1335 endif #ifeq ($(mixed-targets),1)
1337 PHONY += checkstack kernelrelease kernelversion
1338 checkstack:
1339 $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \
1340 $(PERL) $(src)/scripts/checkstack.pl $(ARCH)
1342 kernelrelease:
1343 $(if $(wildcard include/config/kernel.release), $(Q)echo $(KERNELRELEASE), \
1344 $(error kernelrelease not valid - run 'make prepare' to update it))
1345 kernelversion:
1346 @echo $(KERNELVERSION)
1348 # Single targets
1349 # ---------------------------------------------------------------------------
1350 # Single targets are compatible with:
1351 # - build whith mixed source and output
1352 # - build with separate output dir 'make O=...'
1353 # - external modules
1355 # target-dir => where to store outputfile
1356 # build-dir => directory in kernel source tree to use
1358 ifeq ($(KBUILD_EXTMOD),)
1359 build-dir = $(patsubst %/,%,$(dir $@))
1360 target-dir = $(dir $@)
1361 else
1362 zap-slash=$(filter-out .,$(patsubst %/,%,$(dir $@)))
1363 build-dir = $(KBUILD_EXTMOD)$(if $(zap-slash),/$(zap-slash))
1364 target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
1365 endif
1367 %.s: %.c prepare scripts FORCE
1368 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1369 %.i: %.c prepare scripts FORCE
1370 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1371 %.o: %.c prepare scripts FORCE
1372 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1373 %.lst: %.c prepare scripts FORCE
1374 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1375 %.s: %.S prepare scripts FORCE
1376 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1377 %.o: %.S prepare scripts FORCE
1378 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1379 %.symtypes: %.c prepare scripts FORCE
1380 $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
1382 # Modules
1383 / %/: prepare scripts FORCE
1384 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1385 $(build)=$(build-dir)
1386 %.ko: prepare scripts FORCE
1387 $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
1388 $(build)=$(build-dir) $(@:.ko=.o)
1389 $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost
1391 # FIXME Should go into a make.lib or something
1392 # ===========================================================================
1394 quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs)))
1395 cmd_rmdirs = rm -rf $(rm-dirs)
1397 quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files)))
1398 cmd_rmfiles = rm -f $(rm-files)
1401 a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \
1402 $(NOSTDINC_FLAGS) $(CPPFLAGS) \
1403 $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(basetarget).o)
1405 quiet_cmd_as_o_S = AS $@
1406 cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $<
1408 # read all saved command lines
1410 targets := $(wildcard $(sort $(targets)))
1411 cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
1413 ifneq ($(cmd_files),)
1414 $(cmd_files): ; # Do not try to update included dependency files
1415 include $(cmd_files)
1416 endif
1418 # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir
1419 # Usage:
1420 # $(Q)$(MAKE) $(clean)=dir
1421 clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj
1423 endif # skip-makefile
1425 PHONY += FORCE
1426 FORCE:
1429 # Declare the contents of the .PHONY variable as phony. We keep that
1430 # information in a variable se we can use it in if_changed and friends.
1431 .PHONY: $(PHONY)